If Scots really want independence for political or cultural reasons, they should go for it. National pride is impossible to price. But if they vote for independence they should do so in the knowledge that their country could end up as one of Europe’s vulnerable, marginal economies. In the 18th century, Edinburgh’s fine architecture and its Enlightenment role earned it the nickname “Athens of the North”. It would be a shame if that name became apt again for less positive reasons.